During the segment for The Late Late Show, James picks up an artist and drives around LA with them singing their biggest hits. What is not to like?
Here’s our pick of the best so far.
Jennifer Lopez
Quite possibly the best one yet, and it had nothing to do with the singing either!
James takes J-Lo's phone mid-drive to look at the endless list of celebs she has in her contacts, and then proceeds to send Leonardo DiCaprio a text - and Leo's reply is hilarious!
There was renditions of some of Jennifer's biggest hits, as well as Bruno Mars' Locked Out Of Heaven, and James even learnt some of her music video dance moves.
Adele
Just when we think we can't love Adele any more, she goes and gives us possibly the best Carpool Karaoke yet!
From singing her own hits, including Someone Like You and the beautiful All I Ask, in perfect harmony with James, to revealing her very generous drunk behaviour – Adele gave us all the feels with this one.
And then she SLAYS Nicki Minaj's verse from Monster... is there anything this woman can't do?!
One Direction
This is basically James’s audition to replace Zayn Malik in the band – and we have to say we’d quite enjoy it if he did!
Twitter exploded when this video was released, with 339,000 tweets about it in the first 24 hours, and we can totally see why...
Harry Styles, Niall Horan, Liam Payne and Louis Tomlinson joined the comedian to perform renditions of their hits including What Makes You Beautiful and Story Of My Life… and it was all kinds of perfect.
James and 1D also played a cheeky game of Sleep With, Marry, Cruise which gave some very interesting results…
Justin Bieber
Justin loved Carpool Karaoke SO much that he did it twice. Both videos are amazing but, in the second instalment, James questions Justin about THOSE naked pictures…
The Sorry hit maker said: “I was so nervous so I finally find the unedited [pictures] and I’m like… I’m still p*ssed because there’s shrinkage.” Oh, Justin.
Biebs certainly got Twitter talking with his Carpool Karaoke videos too, with a combined 300,000+ tweets within the first 24 hours of their releases!
Carrie Underwood
When country music queen Carrie joined James on the road, they worked through her classic tracks Before He Cheats and Jesus Take the Wheel – but they had a surprise up their sleeves.
The duo belted out an incredible version of Wham!’s Wake Me Up, before Carrie took James to a cowboy store to kit him out.
Despite her best efforts, Carrie was unable to convince James to go full cowboy – but he did buy a hat!
Jennifer Hudson
When we found out superstar Jennifer Hudson was taking part in Carpool Karaoke, we knew it was going to be good.
And they didn’t disappoint. While Jen sang her heart out to Trouble, her duet with Iggy Azalea, James impressed her by performing the rapper’s verse!
James and Jen also visited a burger drive-thru – not only because she used to work at Burger King, but so she could also SING his order.
Mariah Carey
James managed to get number one diva Mariah to go for a drive with him… and it was amazing from start to finish.
As well as impressing us – and Mariah – with his knowledge of her biggest hits, James also got her to indulge in some actual body rolling.
Not content with that, Mimi and James showed off the accents they can perform – with her revealing a hidden talent for speaking British!
Which is your favourite? Let us know on Facebook and Twitter.